Harry Styles has spent many a night at Taylor Swift’s hotel this week (Picture: INFphoto.com)

Harry Styles looked dog-tired as he emerged from Taylor Swift’s New York hotel for the umpteenth time yesterday with bags under his eyes.

The Little Things singer worked his usual mussed up look as he headed to his waiting car dressed in a creased checked shirt and his usual skinny jeans, signing fans’ autographs on the way.

Harry looked as though he hadn’t slept a wink as he made his way home (Picture: INFphot.com)

The One Direction star has been bedding down at Swift’s downtown hideout this week as they make the most of their whirlwind romance.

Harry, 18, and the 22-year-old country singer have been virtually inseparable since their reunion last week.

The 1D star sported his usual mussed mane (Picture: INFphoto.com)

Harry and his bandmates Louis Tomlinson, Niall Horan, Zayn Malik and Liam Payne were in the Big Apple to headline at Madison Square Garden on Monday night.

The X Factor exports then returned to the iconic New York venue last night for the Z100 Jingle Ball Concert were Miss Swift was also performing.

One Direction performed at the Z100 Jingle Ball Concert (Picture: Getty)

The boys were so excited about bagging a spot at the bash Zayn even got the initials M.S.G tattooed on his arm.

Louis is thought to have had a similar one done too.

Taylor Swift also performed at the bash… (Picture: Reuters)

And with ‘Haylor’ both strutting their stuff in front of the roaring crowd last night there’s no doubt they spent yet another night together afterwards.

But let’s hope Harry doesn’t get too attached because Taylor – who has dated the likes of Taylor Lautner, Conor Kennedy and John Mayer in the past – recently admitted she has no idea how to make relationships last.

As did The Wanted (Picture: Reuters)

Olly Murs, Cher Lloyd, The Wanted and Justin Bieber also performed at MSG last night.